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Zorluk: KolayNewton's Third Law (Action/Reaction)

An astronaut floating motionless in space throws a heavy wrench directly forward. As a result, the astronaut is pushed backward. According to Newton's Third Law of Motion, what causes the astronaut to move backward?

  1. The wrench exerts a backward force on the astronaut that is equal to the forward force applied to the wrench.Cevap
  2. B
    The astronaut's inertia acts in the opposite direction to resist the forward motion of the wrench.
  3. C
    The heavy mass of the astronaut generates a larger backward force than the wrench's forward force.
  4. D
    The sudden removal of the wrench's weight creates an imbalance that propels the astronaut backward.

Cevap

The wrench exerts an equal and opposite backward force on the astronaut.
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. These forces always act on two different interacting bodies. When the astronaut (Body 1) applies a forward force to the wrench (Body 2), the wrench simultaneously applies a backward force of exactly the same magnitude to the astronaut. This equal and opposite push is what causes the astronaut to move backward.

Adım Adım Çözüm

1
Identify the initial action force described in the scenario.
The action force is the astronaut's hand pushing the heavy wrench forward.
To apply Newton's Third Law, the first interacting body and its applied force must be defined.
2
Apply Newton's Third Law of Motion to find the reaction force.
For the forward force on the wrench, there must be an equal and opposite backward force.
Newton's Third Law dictates that every action has an equal and opposite reaction occurring on the other interacting body.
3
Determine which object applies this reaction force to the astronaut.
The wrench applies the backward force onto the astronaut.
Forces in a Third Law pair always act on opposite objects: Astronaut pushes Wrench, therefore Wrench pushes Astronaut.

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Newton's Third Law (Action/Reaction)
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